Assessment of genetic diversity and mating system of Acacia cyclops restoration and remnant populations

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Abstract

Acacia cyclops, or Ngaamarur, is a common coastal shrub or small tree of the southwest of Western Australia and South Australia used for restoration in these landscapes and elsewhere. Knowledge of genetic diversity and mating systems of restoration populations is often lacking but can help inform likely restoration success. We compared genetic diversity and mating system parameters at three restoration populations of A. cyclops to nearby remnant reference populations. Mean levels of genetic diversity in restoration populations (Na = 1.806, Ne = 1.560, He = 0.270, Ho = 0.359) were not significantly different from those in the reference populations (Na = 1.833, Ne = 1.574, He = 0.269, Ho = 0.352) suggesting diverse seed collections were made for restoration. Allelic genetic divergence among restoration and reference populations was low (DST ≤ 0.04) suggesting that seeds were of local provenance. Mating system parameters were similar among restoration (tm = 0.989, tm–ts = 0.010, rpm = 0.392) and reference populations (tm = 0.868, tm–ts = 0.039, rpm = 0.410), suggesting functionality of the mating system and restitution of generalist insect pollinator services in restored populations at 7, 10, and 12 years after planting. Lower levels of heterozygosity in progeny compared to adults suggest post-germination or late-acting selection against inbred seedlings. Evidence for selection and seedling attrition further emphasizes the benefits of collections from many individuals in well-connected outcrossed source populations. Overall, results suggest available local genetic diversity was captured and restoration populations have mating systems equivalent to those of reference populations.

Original languageEnglish
JournalRestoration Ecology
DOIs
Publication statusE-pub ahead of print - 28 Jun 2019

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Acacia cyclops
mating systems
reproductive strategy
genetic variation
seedling
seed collection
genetic diversity
restoration
pollinator
landscape management
generalist
seedlings
heterozygosity
provenance
pollinating insects
germination
seeds
South Australia
shrub
Western Australia

Cite this

@article{d0b4a1e0fffc463d8ba37292b6e10e70,
title = "Assessment of genetic diversity and mating system of Acacia cyclops restoration and remnant populations",
abstract = "Acacia cyclops, or Ngaamarur, is a common coastal shrub or small tree of the southwest of Western Australia and South Australia used for restoration in these landscapes and elsewhere. Knowledge of genetic diversity and mating systems of restoration populations is often lacking but can help inform likely restoration success. We compared genetic diversity and mating system parameters at three restoration populations of A. cyclops to nearby remnant reference populations. Mean levels of genetic diversity in restoration populations (Na = 1.806, Ne = 1.560, He = 0.270, Ho = 0.359) were not significantly different from those in the reference populations (Na = 1.833, Ne = 1.574, He = 0.269, Ho = 0.352) suggesting diverse seed collections were made for restoration. Allelic genetic divergence among restoration and reference populations was low (DST ≤ 0.04) suggesting that seeds were of local provenance. Mating system parameters were similar among restoration (tm = 0.989, tm–ts = 0.010, rpm = 0.392) and reference populations (tm = 0.868, tm–ts = 0.039, rpm = 0.410), suggesting functionality of the mating system and restitution of generalist insect pollinator services in restored populations at 7, 10, and 12 years after planting. Lower levels of heterozygosity in progeny compared to adults suggest post-germination or late-acting selection against inbred seedlings. Evidence for selection and seedling attrition further emphasizes the benefits of collections from many individuals in well-connected outcrossed source populations. Overall, results suggest available local genetic diversity was captured and restoration populations have mating systems equivalent to those of reference populations.",
keywords = "coastal wattle, red-eyed wattle, restoration genetics, restoration success criteria, seed sourcing, Western Australia",
author = "Millar, {Melissa A.} and Coates, {David J.} and Margaret Byrne and Krauss, {Siegfried L.} and Justin Jonson and Hopper, {Stephen D.}",
year = "2019",
month = "6",
day = "28",
doi = "10.1111/rec.13007",
language = "English",
journal = "Restoration Ecology",
issn = "1061-2971",
publisher = "John Wiley & Sons",

}

TY - JOUR

T1 - Assessment of genetic diversity and mating system of Acacia cyclops restoration and remnant populations

AU - Millar, Melissa A.

AU - Coates, David J.

AU - Byrne, Margaret

AU - Krauss, Siegfried L.

AU - Jonson, Justin

AU - Hopper, Stephen D.

PY - 2019/6/28

Y1 - 2019/6/28

N2 - Acacia cyclops, or Ngaamarur, is a common coastal shrub or small tree of the southwest of Western Australia and South Australia used for restoration in these landscapes and elsewhere. Knowledge of genetic diversity and mating systems of restoration populations is often lacking but can help inform likely restoration success. We compared genetic diversity and mating system parameters at three restoration populations of A. cyclops to nearby remnant reference populations. Mean levels of genetic diversity in restoration populations (Na = 1.806, Ne = 1.560, He = 0.270, Ho = 0.359) were not significantly different from those in the reference populations (Na = 1.833, Ne = 1.574, He = 0.269, Ho = 0.352) suggesting diverse seed collections were made for restoration. Allelic genetic divergence among restoration and reference populations was low (DST ≤ 0.04) suggesting that seeds were of local provenance. Mating system parameters were similar among restoration (tm = 0.989, tm–ts = 0.010, rpm = 0.392) and reference populations (tm = 0.868, tm–ts = 0.039, rpm = 0.410), suggesting functionality of the mating system and restitution of generalist insect pollinator services in restored populations at 7, 10, and 12 years after planting. Lower levels of heterozygosity in progeny compared to adults suggest post-germination or late-acting selection against inbred seedlings. Evidence for selection and seedling attrition further emphasizes the benefits of collections from many individuals in well-connected outcrossed source populations. Overall, results suggest available local genetic diversity was captured and restoration populations have mating systems equivalent to those of reference populations.

AB - Acacia cyclops, or Ngaamarur, is a common coastal shrub or small tree of the southwest of Western Australia and South Australia used for restoration in these landscapes and elsewhere. Knowledge of genetic diversity and mating systems of restoration populations is often lacking but can help inform likely restoration success. We compared genetic diversity and mating system parameters at three restoration populations of A. cyclops to nearby remnant reference populations. Mean levels of genetic diversity in restoration populations (Na = 1.806, Ne = 1.560, He = 0.270, Ho = 0.359) were not significantly different from those in the reference populations (Na = 1.833, Ne = 1.574, He = 0.269, Ho = 0.352) suggesting diverse seed collections were made for restoration. Allelic genetic divergence among restoration and reference populations was low (DST ≤ 0.04) suggesting that seeds were of local provenance. Mating system parameters were similar among restoration (tm = 0.989, tm–ts = 0.010, rpm = 0.392) and reference populations (tm = 0.868, tm–ts = 0.039, rpm = 0.410), suggesting functionality of the mating system and restitution of generalist insect pollinator services in restored populations at 7, 10, and 12 years after planting. Lower levels of heterozygosity in progeny compared to adults suggest post-germination or late-acting selection against inbred seedlings. Evidence for selection and seedling attrition further emphasizes the benefits of collections from many individuals in well-connected outcrossed source populations. Overall, results suggest available local genetic diversity was captured and restoration populations have mating systems equivalent to those of reference populations.

KW - coastal wattle

KW - red-eyed wattle

KW - restoration genetics

KW - restoration success criteria

KW - seed sourcing

KW - Western Australia

UR - http://www.scopus.com/inward/record.url?scp=85070693178&partnerID=8YFLogxK

U2 - 10.1111/rec.13007

DO - 10.1111/rec.13007

M3 - Article

JO - Restoration Ecology

JF - Restoration Ecology

SN - 1061-2971

ER -